MC Qu. 82 RedStone Mines stock returned... RedStone Mines stock returned 7.5, 15.3,-9.2, and 11.5 percent over the past four years, respectively. What is the geometric average return? 5.84 percent 6.36 percent 775 percent 9.94 percent 10.33 percent 4 value: 1.00 points MC Qu. 69 Over the past four years... Over the past four years, a stock produced returns of 13, 6,-5, and 18 percent, respectively. What is the standard deviation of these returns? 8.63 percent O 9.93 percent 9.97 percent 10.11 percent 10.15 percent